The Dumbbell Nebula (also known as the Apple Core Nebula, Messier 27, and NGC 6853) is a planetary nebula (nebulosity surrounding a white dwarf) in the constellation Vulpecula, at a distance of about 1360 light-years. It was the first such nebula to be discovered, by Charles Messier in 1764. At its brightness of visual magnitude 7.5 and diameter of about 8 arcminutes, it is easily visible in binoculars and is a popular observing target in amateur telescopes.
Central star
The central star (brightly visible on my photo), a white dwarf progenitor, is estimated to have a radius which is 0.055±0.02 R☉ (0.13 light seconds) which gives it a size larger than most other known white dwarfs. The central star mass was estimated in 1999 by Napiwotzki to be 0.56±0.01 M☉.
| Object | M27 or NGC 6853 - Dumbbell Nebula |
| Constellation: | Vulpecula |
| Position: | RA 19h 59m 36.340s DEC +22° 43′ 16.09″ |
| Apparent Size: | 8 x 5.6 arcmins |
| Apparent Magnitude: | 7.5 |
| Distance in light years: | 1360 ly |
| Photo Data | |
| Date of Expose: | 27.08.2019, 21:48 UTC |
| Location: |
Knottenried/Oberallgäu/Germany (1002m ASL) GPS: 47°36’13“ N / 10°11’24“ E |
| Sky darkness SQM-L | Zenit 21.23mag/sqrsec, Object 21.24mag/sqrsec |
| Telescope: | TS 14" RC f/d 8.0 / 2845mm |
| Camera: | Sony A7Ra (astromodified) @ T sensor = 21.3°C !! |
| Field of View: | 0.72 x 0.48 deg |
| Pixel Scale/Resolution: | 0.35 arcsec/px |
| Expose frames/times: | OSC ISO 3200, RAW 18x30s, 16 darks |
| Total expose: | 9min 0s |
| Filter: | no |
| Mount: | HPS 10Micron GM 3000 |
| Software: | DSS 3.3.4, Photoshop CC |
| Remarks: |
© Photos by Peter Cerveny
© Object description/intro text fully or partially by Wikipedia,
which is released under the Creative Commons Attribution-ShareAlike 4.0 International License